Array Capacity Utilization Reports > IBM Array Site Summary
  
Version 10.2.01P10
IBM Array Site Summary
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Four or eight disk drive modules comprise an Array Site. Then, one or two Array Sites comprise an Array. An Array is an Array Site that has been formatted to a specific RAID format.
Understanding IBM Enterprise Storage Capacity Calculations
Capacity values for IBM arrays may appear different from what is reported by the IBM CLI or IBM Tools, as IBM uses a decimal gigabyte—10^9 bytes, while APTARE IT Analytics uses 1024 for a KB when converting to GB.
For FB open systems hosts, an extent is 1 GB. For CKD IBM zSeries or S/390 systems, an extent is 1 cylinder (.92 GB).
In the Scope Selector, you can narrow the report output by selecting values for the following criteria:
State: Assigned, Unassigned, Unavailable
Disk Classes: ENT, NL
Array Site
The Array Site ID.
Storage Array
The physical storage system; Drill down to the IBM Array Detail.
DA Pair
Device adapter pair number—the physical I/O enclosure location. If the DA Pair is an even number, it indicates the first DA pair in the enclosure; an odd number indicates the second DA pair in the enclosure.
Capacity
The capacity of all disks belonging to the Array Site.
# of Disks
Number of disks associated with this Array Site. Links to the IBM Disk Summary.
Array Name
Links to the IBM Array Summary.
Disk RPM
The disk revolutions per minute, such as 10000 or 15000.
State
assigned, unassigned, unavailable, initializing. Indicates if the array site is assigned to the array. If the state is unavailable, its capacity is not included in the total array capacity calculation, as shown in the Array Capacity and Utilization report.
Disk Class
Enterprise fibre channel drives (ENT) or Nearline ATA drives (NL).